117212457655 has 16 divisors (see below), whose sum is σ = 142499437920. Its totient is φ = 92542686208.

The previous prime is 117212457643. The next prime is 117212457697. The reversal of 117212457655 is 556754212711.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 117212457655 - 2¹⁵ = 117212424887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247311 + ... + 543679.

It is an arithmetic number, because the mean of its divisors is an integer number (8906214870).

Almost surely, 2^117212457655 is an apocalyptic number.

117212457655 is a deficient number, since it is larger than the sum of its proper divisors (25286980265).

117212457655 is an equidigital number, since it uses as much as digits as its factorization.

117212457655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297410.

The product of its digits is 588000, while the sum is 46.

The spelling of 117212457655 in words is "one hundred seventeen billion, two hundred twelve million, four hundred fifty-seven thousand, six hundred fifty-five".